//
//  Atom.m
//  4.7Practice
//
//  Created by mac on 4/7/16.
//  Copyright (c) 2016 liuchengming. All rights reserved.
//

#import "Atom.h"

@implementation Atom

-(id) init
{
    if ((self =[super init]))
    {
        _chemicalElement=@"None";
    }
    return self;
}

-(NSUInteger) massNumber
{
    return 0;
}

@end
